"PS has anyone done any PIC Have Quick stuff?" If I told you I'd have to shoot you ;-)
Robert. ________________________________ From: Brooke Clarke <[email protected]> To: [email protected] Sent: Sunday, 28 July 2013, 23:58 Subject: Re: [time-nuts] More pictures of the mystery Collins Ru Hi: The military UHF voice radio scrambling depends on accurate time, hence the Have Quick (and follow on programs) time transfer standard. Rb standards were used to maintain that time in the early days. The O-1814 Rb standard was used to keep time on the ground accurate so that when a plane flew in from far away the crypto would be in sync. http://www.prc68.com/I/O1814.shtml PS has anyone done any PIC Have Quick stuff? Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Brooke Clarke wrote: > Hi: > > I think (3). See: > http://en.wikipedia.org/wiki/TACAMO > http://en.wikipedia.org/wiki/Ground_Wave_Emergency_Network -> some converted > to DGPS > > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > > Robert Atkinson wrote: >> Hi Tim, >> Three possible reasons for needing a Rb standard, >> 1/ Coherent detection with a local clock >> 2/ Hyperbolic navigation (local reference improves the fix and holdover) >> 3/ Secure communications. >> >> Robert G8RPI >> >> >> >> >> ________________________________ >> From: Tim Shoppa <[email protected]> >> To: Discussion of precise time and frequency measurement <[email protected]> >> Sent: Sunday, 28 July 2013, 15:25 >> Subject: Re: [time-nuts] More pictures of the mystery Collins Ru >> >> Googling a little bit, I find several references to a Collins rubidium >> package AFS-81 for airborne survivable VLF communications in the 60's >> (predating this unit by maybe two decades). Still trying to wrap my head >> around why that would need rubidium unless it was an airborne WWVB >> replacement or something. >> >> Googling also turned up the modern Rockwell-Collins 617A-1 VLF amp which >> seems to be a dinky solid state unit that is rated at a third of a >> megawatt. Still having a hard time wrapping my mind around that! Maybe I'm >> off by 2 or 3 orders of magnitude or the picture is just the control head, >> the real amplifier is the size of a building. A third of a megawatt must be >> the size of the fixed transmitters used for VLF submarine communications. >> >> Tim N3QE >> >> >> On Sun, Jul 28, 2013 at 9:40 AM, Pete Lancashire >> <[email protected]>wrote: >> >>> maybe I should read things more often .. yikes I need a vacation >>> >>> >>> On Sun, Jul 28, 2013 at 7:01 AM, George Dubovsky <[email protected]> >>> wrote: >>> >>>> Well, the outside label does claim it was made by GENRAD... ;-) >>>> >>>> 73, >>>> >>>> geo - n4ua >>>> >>>> >>>> On Sat, Jul 27, 2013 at 9:24 PM, Pete Lancashire < >>> [email protected] >>>>> wrote: >>>>> >>> https://plus.google.com/u/0/photos/111617808980322733757/albums/5890266601277045697 >>>>> The board with the edge connector was inside the same bag the >>>>> connector was in, the bag was taped to the unit. >>>>> >>>>> I pulled the ends off first, but was immediately stopped with foam, it >>> is >>>>> glued in place. >>>>> Then when I finally got the lid with all the screws off, all there is, >>> is >>>>> one board covered in potting compound. >>>>> >>>>> The compound breaks away pretty easily. One can see where a couple >>> parts >>>>> were >>>>> replaced and there soft RTV was used. There are two precision resistors >>>> in >>>>> that area. >>>>> >>>>> The biggest surprise is the General Radio logo on the board ! >>>>> >>>>> goo.gl/1XGG2F >>>>> _______________________________________________ >>>>> time-nuts mailing list -- [email protected] >>>>> To unsubscribe, go to >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
